Epoxy terminated polyurethanes

ABSTRACT

WHERE N IS A WHOLE NUMBER, AT LEAST 2, PREFERABLY 2 OR 3, R stands for a n-valent aliphatic residue which may be interrupted by oxygen atoms and A represents the residue of a glycol or of a polyglycol whose terminal hydroxyl groups have been removed, and (2) the diglycidyl ether of a glycol or polyglycol.   An epoxy resin mixture containing (1) the polyepoxide of the formula

United States Patent Continuation-impart 01 application Ser. No. 653,314, July 14, 1967, now abandoned. This application Feb. 3, 1970, Ser. No. 8,407

EPOXY TERMINATE!) POLYURETHANES 16 Claims, No Drawings [1.8. CI ..-.....260/830 TW, 260/2 EP, 260/13, 260/14, 260/15, 260/18 PN, 260/37 EP, 260/38, 260/39 R, 260/775 R, 260/77.5 AM, 260/830 P, 260/831, 260/834 Int. Cl. C08g 45/00, C08g 45/12, C08g 22/00 Field of Search 260/830 P,

830 TW, 77.5 R, 77.5 HM

[56] References Cited UNITED STATES PATENTS 2,830,038 4/1958 Pattison 260/830 P 3,158,586 11/1964 Krause 260/830P 3,284,375 11/1966 Shokal 260/2 3,459,828 8/1969 Michelotti 260/830 TW 3,499,948 3/1970 Jellinek 260/830 TW Primary Examiner- Paul Lieberman Attorneys-Harry Goldsmith, Joseph G. Kolodny and Mario A. Monaco ABSTRACT: An epoxy resin mixture containing (1) the .292'22921QE9QF9F9FW'? where n is a whole number, at least 2, preferably 2 or 3, R stands for a n-valent aliphatic residue which may be interrupted by oxygen atoms and A represents the residue of a glycol or of a polyglycol whose terminal hydroxyl groups have been removed, and (2) the diglycidyl ether of a glycol or polyglycol.

EPOXY TERMINATE!) POLYURETHANES CROSS REFERENCES TO RELATED APPLICATIONS where n is a whole number of at least 2 and at most 3, R is the radical which is obtained by removing the hydroxyl groups from a member selected from the group consisting of aliphatic saturated diol or triol of two to six carbon atoms, polyethylene glycol, polypropylene glycol and polybutylene glycol. A

represents a residue selected from the group consisting of glycol with four to six carbon atoms and diglycol with four to six carbon atoms.

According to this invention the new polyepoxides containing urethane groups are obtained when a urethane preadduct of the general formula (II) CH:

where n is a whole number-of at least 2 and at most 3 and R stands for an n-valent aliphatic residue of the same meaning as in formula (l) is reacted with a l,2-epoxy alcohol of the formula (III) CHr--CHCHzOA-OH where A stands for the residue of a glycol ro diglycol with four to six carbon atoms whose tenninal hydroxyl groups have been removed.

The starting compounds (ll) belong to the known type of urethane preadducts (urethane prepolymers) some of which are available in the market; they are obtained by adding a polyalcohol R(OH),, on to n mols of toluylene-2,4-diisocyanate.

Preferred relevant polyalcohols R(OH),, are glycols, such as ethyleneglycol, propane-1,3-diol, propane-l ,2-diol, 2-butene- 1,4-diol, bis-(4-hydroxybutyl)ether, propane-1,3-diol, l,l,1- trimethylolethane, l, l l trimethylolpropane, pentaerythritol and polyglycols such as diethyleneglycol, triethyleneglycol, dipropyleneglycol and the higher polyglycols, such as the liquid and solid polyethyleneglycols, polypropylene-1,2 or 1,3-glycols, copolymers from ethylene oxide and propylene oxide, oxetan or tetrahydrofuran, poly(butylene-l,4-glycol), poly(hexylene-l,6-glycol) and also poly(propylene-l,2- glycol) whose terminal secondary hydroxyl group may have been converted into a primary hydroxyl group by an additive reaction with ethylene oxide.

Further suitable long-chain starting compounds of the formula R(Ol-l), are polyacetals containing terminal hydroxyl groups, which are obtained by copolymerizing alkylene oxides, such as ethylene or propylene oxide, with formaldehyde or trioxan, or from aldehydes, especially formaldehyde, and alcohols whose hydroxyl groups are separated from one another by at least 4 carbon atoms, such as butane-1,4-diol, pentanel ,S-diol, hexane-1,6-diol and decanel l O-diol.

Further very suitable starting compounds R(OH),, are long chain, linear polyesters containing terminal hydroxyl groups, derived from such acids as oxalic, malonic, succinic, glutaric, methyladipic, sebacic, diglycollic, methylene-bis-thioglycollic, 'y, 'y'-sulpho-dibutyric, thiodibutyric, phthalic, isophthalic, terephthalic and especially adipic acid, the glycol component concerned being di-, trior polyethyleneglycol, propane-1,2- or -l,3-diol, butane-L4, -l,3- or -2,3-diol, hexane-Lo-diol, decane-l ,lO-diol, octadecanel l 2-diol, 2,2-dimethylpropane-1,3-diol, glycerol monomethyl ether or especially ethyleneglycol.

Polyols suitable for synthesizing the compounds (ll), which contain at the same time sulfide groups, are obtained by using thioglycol, a polyglycol based on thioglycol or a polyester based on thioglycol, which contain terminal, primary hydroxyl groups. instead of thiodiglycol there may be used bis(4- hydroxybutyl)thio ethers.

When n is greater than 2, it is possible to use as starting materials R(OH),, for the polyisocyanates (I!) also branched polyethers, poiythioethers or polyesters. These products are obtained by using for the manufacture of the polyglycols polyalcohols in addition to glycols, or by using polyhydroxy compounds as initiators in the polymerization of alkylene oxides, such as ethylene or propylene oxide. Suitable polyhydroxy compounds are glycerol, pentaerythritol, sorbitol, mannitol, hexane-1,2,6-triol and trimethyolpropane. in a similar manner branched polyesters, which contain only terminal hydroxyl groups, may be used.

Further suitable starting compounds are those commercial urethane preadducts which contain partially reacted toluylene-Z,4-diisocyanate residues and correspond to the formula (11), including products whose content of isocyanato groups has dropped somewhat owing to the action of moisture during storage. The polyisocyanates (ii) are obtained by adding n mols of toluylene-2,4-diisocyanate to 1 mol of the nhydric polyol of the formula R(OH), under mild conditions.

Suitable monoepoxy alcohols (III) are in the first place lowmolecular monoglycidyl ethers of diols, such as butane-L4- diol-monoglycidyl ether, pentanediol-l,S-monoglycidyl ether, hexane-l,6-diol-monoglycidyl ether and 3-cyclohexenedimethanoll ,l-monoglycidyl ether and also diethyleneglycolmonoglycidyl ether and butanel ,3-diol-monoglycidyl ether.

In a special variant of the invention there are used the commercial mixtures obtained in the manufacture of the monoglycidyl ethers of the glycols and which, according to the route by which they have been obtained, may still contain a major share of the free glycols, or preferably a major share of the diglycidyl ethers of the glycols. Apart from the lowmolecular commercial monoglycidyl ethers of the glycols the high-molecular monoglyciyl ethers of the above-mentioned polyglycols are of special value: they are obtained by reacting about 0.5 to about 2.5 mols of epichlorohydrin with one of the above-mentioned linear polyglycols. When such commercial monoglycidyl ethers are used to synthesize the diglycidyl ethers manufactured according to this invention, the final product contains as an accompanying mixture component the bisglycidyl ether of the polyglycol.

The addition of the epoxyalcohols on to the isocyanato group in position 2 of the polyisocyanates (ll) consists in prolonged heating at a slightly raised temperature. Alternatively, the addition of the alcoholic hydroxyl group can be accelerated in known manner by adding basic compounds, espe cially tertiary amines such as triethylamine, pyridine, methylpyridine, N,N-dimethylpiperazine, N,N-dimethylaminocyclohexane and N,N endmethylenepiperazine but in this case, when the reaction turns out to be exothermic, it is necessary to dissipate the heat of reaction. As further suitable catalysts there may be mentioned metal salts, such as iron (lll) chloride, zinc chloride, tin(ll)chloride, tin octoate, acetylacetonates, such as iron and zinc acetylacetonate, and dibutyl tin dilaurate and molybdenum glycolate. Most of these products are viscous resins.

The polyepoxides of this invention react with the usual curing agents for polyepoxy compounds and can therefore be cross-linked or cured by addition of such curing agents in the same way as other polyfunctional epoxy compounds or epoxy resins. As such curing agents there are suitable basic and espe cially acidic compounds.

Good results have been achieved with the following: Amines or amides, such as aliphatic or aromatic primary, secondary and tertiary amines, for example m phenylenediamine, p-phenylenediamine, bis(p-aminophenyl)sulphone, bis(p-aminophenyl)metha.ne, ethylenediamine, hexamethylenediamine, trimethylhexamethylenediamine,N,N2diethylethylenediamine, diethylenetriamine, tetra(hydroxyethyl)diethylenetriamine, triethylenetetramine, N,N-dimethylpropylenediamine, bis(4- aminocyclohexyhmethane, bis(4-aminocyclohexyl)dimethylmethane, 3-(aminomethyl-3,5,5-trimethylcyclohexylamine, Mannich's bases such as 2,4,6-tris(dimethylaminomethyl)- phenol; dicyandiamide, urea-formaldehyde resins, melamineformaldehyde resins; polyamides, for example those from aliphatic polyamines and dimerized or trimerized unsaturated fatty acids; polyhydric phenols, for example resorcinol, bis(4- hydroxyphenyl)dimethylmethane, phenol-formaldehyde resins, reaction products of aluminum alcoholates or phenolates with compounds of tautomeric reaction of the acetoacetic acid ester type, Friedel-Crafts catalysts, for example AlCl SbCl,,, SnCl ZnCl,, BF; and their complexes with organic compounds, for example BF -amine complexes, metal fluoroborates such as zinc fluoroborate, phosphoric acid; boroxines such as trimethoxyboroxine.

Preferred curing agents are polybasic carboxylic acids and their anhydrides, for example the anhydrides of the following acids: Phthalic, tetrahydrophthalic, hexahydrophthalic, methylhexahydrophthalic, endomethylene-tetrahydrophthalic, methyl-endomethylene-tetrahydrophthalic methyl nadic anhydride), hexachloro-endomethylene-tetrahydrophthalic, succinic, adipic, maleic, allylsuccinic, dodecenylsuccinic acid; 7-allyl-bicyclo(2.2.l)hept-S-ene-2,3 dicarboxylic acid and also pyromellitic dianhydride or mixtures of such anhydrides. Curing agents that are liquid at room temperature are preferred.

If desired, there may be additionally used accelerators, such as tertiary amines or their salts or quaternary ammonium compounds, for example tris(dimethylaminomethyl)phenol, benzyldimethylamine or benzyldimethyl ammonium phenolate, tin(ll)salts of carboxylic acids, such as tin(ll )octoate or alkali metal alcoholates, such, for example, as sodium hexylate.

As a rule, however, the additional use of such accelerators is not necessary and this is a special advantage of the new polyepoxy compounds of this invention over most known cycloaliphatic polyepoxy compounds.

For curing the polyepoxides of this invention with anhydrides it is advantageous to use for every gram equivalent of epoxide groups 0.5 to l. l g. equivalents of anhydride groups.

Optimal properties of the cured products are in general achieved by using one equivalent of anhydride group for every equivalent of epoxide groups. When, however, an accelerator containing hydroxyl groups is used additionally, it is advantageous to increase the quantity of anhydride curing agent added.

The term curing" as used in this context describes the conversion of the above polyepoxides into insoluble and infusible, cross-linked products, as a rule together with shaping to furnish shaped bodies, such as castings, mouldings or laminates or flat structures such as lacquer films or cemented products.

Accordingly, the present invention also provides curable mixtures containing the polyepoxides of this invention, possibly in combination with other diepoxy or polyepoxy compounds and furthermore curing agents for epoxy resins, preferably anhydrides of dicarboxylic or polycarboxylic acids.

Furthermore, the polyepoxy compounds of this invention and their mixtures with other polyepoxide and/or curing agents may be admixed at any stage prior to the curing operation with fillers, plasticizers, pigments, dyestuffs, flame-inhibitors or mould lubricants.

Suitable extenders and fillers are, for example, asphalt, bitumen, glass fibers, cellulose, mica, quartz meal, aluminum hydroxide, gypsum, kaolin, ground dolomite, colloidal silica having a large specific surface (AEROSlL) or metal powders, such as aluminum powder.

The cured mixtures may be used in the unfilled or filled state, if desired, in the form of solutions or emulsions, as textile assistants, coating agents, laminating resins, paints, lacquers, dipping resins, casting resins, moulding resins, moulding compositions, brushing compounds, pore fillers, floor coverings, potting and insulating compounds for the electrical industry, adhesives or for the manufacture of such products.

Manufacture of the glycidyl ethers containing hydroxyl groups or of mixtures containing such glycidyl ethers, used as starting materials in the following examples The pressure is indicated in mm. Hg. The indicated values for the epoxide equivalents per kg. have been determined by the method described by A. J. Durbetaki in Analytical Chemistry, volume 28, No. 12, Dec. 1956, pages 2000-2001, with the use of hydrogen bromide in glacial acetic acid.

1. Manufacture of butane-l ,4-diol-monoglycidyl ethers A. Manufacturing the crude product A mixture of about l,080 g. (12 mols) of butane-diol-l,4 and 3,366g. (36 mols) of epichlorohydrin is heated with a heating bath to about 65 C. in a 6-liter flask equipped with agitator, reflux condenser, internal thermometer and a closable neck for the portionwise addition of sodium hydroxide. During about 1% hours, a total of 540 g. (13.2 mols) of sodium hydroxide (of about 98 percent purity) was added in l0 equal portions, while the external temperature, which initially had been kept at about 70 C., was lowered first to about 40 C. and towards the end of the addition of sodium hydroxide to 30 C. The addition of each successive portion of sodium hydroxide was made after the evolution of heat due to the precedingly added portion had subsided so far that the internal temperature had again risen to about 60 C. When all sodium hydroxide had been added, an azeotropic mixture of epichlorohydrin and water of reaction was distilled off with a descending condenser, during which the distillation temperature was about C. After cooling to room temperature, the precipitated sodium chloride was filtered off and the salt rinsed with a small quantity of epichlorohydrin. The excess epichlorohydrin was then distilled off from the combined filtrates through a Vigreux column under a pressure of about mm. Hg. and towards the end of about 12 mm. Hg. until the internal temperature was about 120 C. and the external temperature was C. The residue (1,850 g.) in the flask was a brown, clear liquid of low viscosity, which is referred to below as crude product."

B. Manufacturing pure butane-l,4-diol-monoglycidyl ether The 1,850 g. of crude product were distilled through a Claisen head with a descending condenser under about 0.1 mm. Hg. in the crude form, until the distillation temperature had reached about l80 C. to yield about 1,350 g. of a colorless, clear distillate of low viscosity. The residue in the flask weighed about 480 g.

The 1,350 g. of distillate were subjected to a fractional distillation on a column of 35 cm. length, which was filled with rings of stainless steel fabric and which carried a dephlegmator. The fractions passing over at a distillation temperature of GE O Molecular weight: 146.18 calculated: C 57.51 H 9.65

found: 57.71 9.65

C. Commercial butanediol-1,4-monoglycidyl ether Using the method described for the manufacture of the crude product and starting from 405 g. (4.5 mols) of butanel,4-diol, 1,250 g. (13.5 mols) of epichlorohydrin and 202 g. of

NaGl-l (98 percent) [4.95 mols] 640 of a crude product freed from epichlorohydrin were obtained; from this crude product without previous crude distillation on the column as described for the isolation of butanediol-l,4-monoglycidyl ether, the lower boiling initial fractions having a high-epoxide content 15 g.) were removed. The sum of the following fractions (until the content of epoxide equivalents per kg. had begun to drop again after reaching a maximum of 9.0 to 9.88) fumished 402 g. of commercial butanediol-l ,4-monoglycidyl ether containing 6.7 epoxide equivalents per kg. and containing a major share of the diglycidyl ether of butanedio1-l,4 and still a small quantity of butanediol-l ,4.

11. Manufacture of hexanediol-l ,6-monog1ycidyl ether From a batch containing 826 g. of commercially pure hexanediol-1,6 and 1,050 g. of toluene, introduced into a 2,5-liter flask equipped with agitator, internal thermometer, dropping funnel and descending condenser, about 450 g. of toluene was distilled off to remove water, and the mixture was then cooled to an internal temperature of 50 C. The descending condenser was replaced by a reflux condenser and 7 ml. of tin tetrachloride were added to the mixture. Within about 70 minutes a total of 648 g. of epichlorohydrin was dropped in, while keeping the internal temperature at 50 to 51 C, by lowering the temperature of the bath of initially 50 C gradually to 33 C and then raising it again to 50 C only towards the end of the epichlorohydrin addition. The batch was allowed to react for 15 minutes longer at this temperature and then cooled to room temperature. The dropping funnel was removed from the apparatus. At a bath temperature of 20 C, within about 20 minutes, a total of 343 g. of 98 percent sodium hydroxide was added in small portions, whereby the internal temperature was caused to rise to about 30 C. Within another 10 minutes, the mixture was heated to an internal temperature of 50 C., then kept for 1% hour at this temperature and then cooled to room temperature. The precipitated sodium chloride was filtered off and washed with toluene. From the combined filtrates the volatile ingredients were distilled off under a water-jet vacuum at a bath temperature rising to about 90 C. The residue in the flask 1,218 g.) was a crude product containing the hexanediol-l ,6-monoglycidyl ether.

The 1,218 g. of crude product were distilled through a Vigreux column under a pressure of about 0.1 mm. Hg. up to a bath temperature of 240 C. and a distillation temperature of 160 C., to yield 1,133 g. of commercial hexanediol-l,6- monoglycidyl ether containing 5.4 epoxide equivalents per kg. The residue in the flask weighed 41 g. 1,125 grams of the commercial hexanediol-l ,-monoglycidyl ether obtained were subjected to fractional distillation on a 35 cm. long column filled with stainless steel fabric rings and equipped with a dephlegmator, under a pressure of about 0.1 mm. Hg. The constituents passing over between about 80 and 90 C. were collected separately for as long as they contained 5.7 to 6.0 epoxide equivalents per kg. (total 270 g.). These 270 g. were subjected to another fractional distillation on the same column, and the fractions passing over at 87 to 93 C under 0.01 mm. Hg. pressure having a content of 5.7 to 5.8 epoxide equivalents per kg. were again collected separately. Yield: a total of 245 g. of hexanediol-1,6-monoglycidyl ether containing 5.27 (theory: 5.74) epoxide equivalents per kg.

Combustion analysis: CJ'l O Molecular weight: 174.23

calculated c 02.04 H |0.41 0 215% found: 62.3! 10.48 27.70%.

lll. Manufacture of 2,2-dimethylpropanediol-1,3-

monoglycidyl ether 280 grams of a mixture containing the monoglycidyl and the diglycidyl ethers, prepared as described below, was subjected to fractional distillation under a water-jet vacuum (l2mm. Hg.) in a 35 cm. long column filled with wire fabric rings of stainless steel and equipped with a dephlegmator. The fractions containing 6.2 epoxide equivalents per kg. and passing over at 1 19 to C. under 12 mm. Hg. pressure (total 68 g) were collected separately; they consisted of the monoglycidyl ether of 2,2-dimethylpropanediol-l ,3-which revealed the following combustion analysis:

CHHIIOI calculated: C 59.98 H 10.07%

found: 60.] l [0.31%.

According to its gas chromatogram the product was of 98.2 percent purity.

The above mentioned mixture, containing the monoglycidyl and diglycidyl ether of 2,2-diemthylpropanediol-1,3. was obtalned thus:

312 grams of 2,2-dimethylpropanediol-l ,3, 1,560 g. of toluene and 390 g. of epichlorohydrin were mixed in a 2,5- liter flask equipped with condenser, agitator, internal thermometer and closable neck (for the subsequent addition of sodium hydroxide), then 3 ml. of tin tetrachloride were added and the whole was heated on a water bath to 40 C, whereupon a clear solution resulted. Inside of about 2%hours the bath temperature and the internal temperature were raised to about 48 C and thus maintained for about 2 hours, and then another 2 ml. of tin tetrachloride were added to the reaction mixture. The bath and internal temperature were maintained at 50 C for about 1% hours longer and the batch was then cooled to about 15 C.

At a bath temperature of 5 to 10 C 172 g. of sodium hydroxide of 98 percent purity was added portionwise within about 10 minutes at an internal temperature not exceeding about 25 C. Within about A: hour the internal temperature was raised to about 50 C and thus maintained for about 20 minutes.

The batch was then cooled to room temperature. The precipitated sodium chloride was filtered off and rinsed twice with toluene. The unreacted epichlorohydrin and the toluene were distilled out of the combined filtrates under a water-jet vacuum to a bath temperature of about 90 C.

There were obtained 512 g. of a liquid, faintly brownish residue in the flask; it contained 5.3 epoxide equivalents per kg. This crude product contained the monoglycidyl and the diglycidyl ethers of 2,2-diemthylpropanediol-1,3.

From 485 g. of the crude product obtained the volatile constituents were distilled ofi through a Vigreux column under a pressure of about 0.1 mm. Hg. up to a distillation temperature of 90 C (bath temperature about 160 C., internal temperature about C.).

' There were obtained as distillate 290 g. of colorless, clear, commercial 2,2-dimethylpropanediol-1,3-monoglycidyl ether containing 7.4 epoxide equivalents per kg. and a major share of the diglycidyl ether.

As forerunning in the fractional distillation of the commercial monoglycidyl ether there were obtained fractions containing partially crystalline, that is to say unreacted, 2,2-diemthylpropanedioll ,3.

The fractions passing over at 156 C. under 18 mm. Hg, following upon the monoglycidyl ether, insofar as they contain 9.14 to 9.28 epoxide equivalents per kg., consist of 104 g. of pure diglycidyl ether of 2,2-diemthylpropanediol-l ,3. 1V. Manufacture of diethyleneglycol-monoglycidyl ether A. Manufacturing the crude product The procedure described above under 1. Manufacture of butane-l ,4-diol-monoglycidyl ether" was substantially adopted.

There were used 530 g. of diethyleneglycol mols), 185 g. of epichlorohydrin mols) and 205 g. of sodium hydroxide (5 mols). After evaporation there were obtained 786 g. of crude product containing 5.24 epoxide equivalents per kg.

B. Manufacturing the diethyleneglycol-monoglycidyl ether The 786 g. of the above crude product were first subjected to a coarse distillation under a pressure of about 0.1 mm. Hg. through a Claisen head up to an internal temperature of about 160 C. (distillation temperature about 125 C.), to furnish 618 g. of coarse distillate containing 5.8 epoxide equivalents per kg.

The aforementioned 618 g. were then subjected to a fine fractionation under a pressure of about 0.1 mm. Hg. and those fractions which contained 5.5 to 6.2 epoxide equivalents per kg. were collected separately. The corresponding range of the distillation temperature was 80 to 86 C. The 299 g. of the resulting fine distillate contained 6.17 epoxide equivalents per kg. (theory demands 6.166). Gas chromatography revealed a content of 97.1 percent by weight of diethyleneglycolmonoglycidyl ether.

C. Commercial diethyleneglycol-monoglycidyl ether When the previously mentioned crude product was distilled through a Vigreux column under a water-jet vacuum, while continuously checking the epoxide content of the phases that passed over, these values initially dropped significantly while passing through a minimum at about 3.8 epoxide equivalents per kg. (at a distillation temperature of about 130 C.), then they rose slowly and passed a maximum at about 8.5 epoxide equivalents per kg. The distillation was discontinued immediately after this maximum was passed (distillation temperature 175 C.). 1n this manner, 500 g. of crude product yielded 300 g. of distillate containing 6.0 epoxide equivalents per kg., designated as coarse distillate type B."

The distillation described above was repeated, and discontinued when the epoxide content after passing the minimum of about 3.8 epoxide equivalents per kg. had risen again to about 5 epoxide equivalents per kg. (distillation temperature 138 C. The shares that The had passed over up to that point were not considered. The subsequent shares up to immediately after passing the maximum of about 8.5 epoxide equivalents per kg. yielded 200 g. of distillate containing 6.7 epoxide equivalents per kg. and were designated as coarse distillate type A."

V. Manufacturing butane-1,3 -diol-monoglycidyl ether 180 grams (2 mols) of distillate butane-1,3-diol was added to a solution of 1 ml. of boron trifluoride diethyl etherate in liter of absolute toluene. Then 203.5 g. (2.2 mols) of epichlorohydrin were dropped into this reaction mixture so that the exothermic reaction, if necessary aided by external heating, enabled the temperature to be maintained at 67 to 71 C. When all epichlorohydrin has been added, the batch was allowed to react for 4 /zhours longer at 70 to 71 C. Then 80 g. (2 mols) of powdered sodium hydroxide were added to the cooled reaction mixture so that the exothermic reaction kept the temperature constant at 40 C. On completion of the addition the batch was allowed to react for 40 minutes longer at the same temperature, then it was filtered and distilled. The

- fraction passing over between 60 C. under 0.09 mm. Hg. and

79 under 0.09 mm. Hg. pressure had a hydroxyl equivalence weight of 162.0 and an epoxide equivalence weight of 138.5; it weighed 140 grams.

This crude product, which still contained butane-1,3-diol, butane-1,3-diol-diglycidyl ether and mainly the two isomeric butane-1,3-dlol-monoglycldyl ethers, was used for the manufacture of epoxy resin as it was.

Example 1 174 grams of toluylene-Z,4-diisocyanate were mixed with 206 g. of polyethyleneglycol (mean molecular weight 412; mean hydroxyl equivalent weight 206), whereupon a faintly exothermic reaction set in. The reaction mixture was maintained, with stirring and exclusion of moisture, first by slight cooling and after the exothermic reaction had subsided by additional heating at 35 to 40 C. until an isocyanate equivalent weight from 370 to 390 was reached, which was the case after about 2% to 3 hours. The progress of the reaction was checked by repeated determination of the isocyanate equivalent weight by titrating the excess of a predetermined quantity of dibutylamine solution (according to E. Muller, in Houben-Weyl, Methoden der organischen Chemie, 4th edition 14/2, page 85 [1961]). 147 grams of 98.1 percent butane-1,4-diol-monoglycidyl ether were added to 380 g. of the isocyanate preadduct having an isocyanate equivalent weight of 380 obtained above, and the whole was heated at 40 C. until a content of isocyanate was no longer detected, which took about 10 hours.

The reaction product was a viscous epoxy resin containing 2.0 epoxide equivalents per kg., which consisted substantially of the compound of the formula in which G represents the residue of a polyethyleneglycol HOG,-OH, whose terminal hydroxyl groups have been removed, having a mean molecular weight of 4 l 2.

The resulting epoxy resin was cured at an elevated temperature with hexahydrophthalic anhydride. The specimens revealed the following mechanical properties:

Tensile strength (VSM 77 101) 1.9 kgJmm. elongation at rupture (VSM 77 101) 70percent.

Example 2 56.7 grams of polybutyleneglycol (mean molecular weight 6.54; mean hydroxyl equivalent weight 327) were mixed with 30.4 g. of toluylene-2,4-diisocyanate, whereupon a weakly exothermic reaction set in. While stirring the reaction mixture with exclusion of moisture, it was heated at 70 to C until titration according to example 1 revealed a content of only 1.95 to 2.05 isocyanate equivalents per kg. 51.3 grams of the resulting viscous product, having an isocyanate equivalent weight of 513, were mixed with 14.7 g. of 98.1 percent butane-1,4-diol-monoglycidyl ether and heated at 60 to 70 C until isocyanate could no longer be detected, which took about 4 to 5 hours. The resulting product was an epoxy resin containing 1.46 epoxide equivalents per kg., consisting substantially of the compound of the formula wlhere (i is the residue' of the polybutyleneglycol HOG, in which G represents the residue of the polypropyleneglycol OH, which has been freed from its terminal hydroxyl groups, HOG OH, freed from its terminal hydroxyl groups, of of mean molecular weight 654. mean molecular weight 440.

After C ing w 2,2,4- ime hylLfl n h x fleXi- 10 The resulting epoxy resin was cured at an elevated temperavble,rubber-elastic castings were obtained. ture with hexahydrophthalic anhydride. The specimens 490 g. of polybutyleneglycol (mean molecular weight 980;

revealed the following mechanical properties: Example 3 Tensile strength (VSM 77 l0l) 2.4 kg./mm.

174 grams of toluylene-2,4-diisocyanate were mixed with elongation rupture (VSM 77 101) 77 Percentmean hydroxyl equivalent weight 490), whereupon a weakly Example 5 exothermic reaction set in. While excluding moisture and stir- While stirring a mixture of 394 g. of polyethyleneglycol ring the mixture it was maintained at C. until the iso- (mean molecular weight 874; mean hydroxyl equivalent cyanate'equivalent weight reached 650 to 670, which was the 20 weight 437) and 177 g. of toluylene-2,4-diisocyanate with excase after about 3%to4hours. clusion of moisture it was allowed to react at 40 to C.

after an initial exothermic reaction; the previously calculated isocyanate equivalent weight of 590 to 610 was reached after about 5 hours.

25 The resulting preadduct, having an isocyanate equivalent weight of 598, was mixed with 134 g. of 98.1 percent butanel,4-diol-monoglycidyl ether, and the reaction mixture was heated at 50 to C. until isocyanate could no longer be detected, which took about 8 hours. The resulting waxy epoxy 664 grams of the preadduct obtained above, of isocyanate equivalent weight 666, were mixed with 146 g. of 98 percent butane-l ,4-diol-monoglycidyl ether, and the whole was stirred and heated at 50 C. until isocyanate could no longer be detected. The product obtained was a viscous epoxy resin containing 1.28 epoxide equivalents per kg., consisting substantially of the compound of the formula CHrCHOHz-O(CH9)AOC OHITT IITHC OO(CH2)4O-CH2CHCH9 CH;NHCOO- Gs-OCONHCH3 where 0;, represents the residue of the polybutyleneglycol resin contained 1.63 epoxide equivalents per kg. and consisted HOG -OH, whose terminal hydroxyl groups have been substantially of the compound of the forumla Cr CH-CHr()-(CH2)|O-C O-NH ITH-COO(CHz)4OCHgCHCI-I2 cm-Oun-c OOGOCONH-CH;

removed, having a mean molecular weight of 980. in which G, represents the residue of the polypropyleneglycol HOG OH, whose terminal hydroxyl groups have been Example 4 removed, having a mean molecular weight of 874.

174 grams of to!uylene-2,4-diisocyanate were mixed with 220 g. of polypropyleneglycol (mean molecular weight 440; n h droxyl equivalent weight 220), whereupon an ex- 72.l grams of ADIPREN L-lOO (commercial product of 55 Messrs. DuPont, Wilmington Del. U.S.A.; an adduct from polybutyleneglycol and toluylenediisocyanate), which by absorption of water had a residual content of only 1.39 isocyanate equivalents per kg., was mixed with I 3. of distilled 2,2-dimethylpropanedio|--monoglycidyl ether of 98.2 per- 0 cent purity, and the mixture was heated at C. until isocyanate could no longer be detected.

The total reaction time was 4 to 5 hours. The resulting product was a yellowish, waxy epoxy resin containing l.l7 epoxide equivalents per kg.

On curing the resin with hexamethylenediamine, flexible, notch-resistant castings were obtained.

Example 6 othermic reaction set in. The reaction mixture was maintained at 40 to 50 C., initially by slight cooling and after the exothermic reaction has subsided by additional heating, while stirring and with exclusion of moisture, until the isocyanate equivalent weight was between 380 and 400, which took about 4 hours.

393 grams of the product obtained above, having an isocyanate equivalent weight of 390 were mixed with 146 g. of 98.1 percent butane-l,4-diol-rnonoglycidyl ether and the whole was stirred and heated at 50 C., until isocyanate could 65 no longer be detected, which took about 6 hours. The product was a yellowish, viscous epoxy resin containing 2.l2 epoxide equivalents per kg, consisting substantially of the compound F 7 of the formula 70 200 grams of absolute chlorobenzene were mixed with 24.8

1 1 12 g. (0.4 mol) of freshly distilled ethyleneglycol and 139.0 g. 396 grams of the resulting epoxy resin were heated to 80 C. (0.8 mol) of toluylene-2,4-diisocyanate, whereupon an exand thoroughly mixed with 99 g. of 4,4-diaminodiphenylothermic reaction set in, but it could be contained at 35 to methane. After having removed, the air bubbles the mixture 37 C. by slight cooling. After about 1 hour the reaction mixwas poured into preheated stretch moulds and heated for 16 ture was homogenous. The progress of the reaction was 5 hours at 100 C. The stretch specimens revealed the following checked by repeated determination of the isocyanate strength values:

equivalent weight of the reaction mixture. When the value ap- Tensile strength (VSM 77 101) 6.42 kg./mm. preached the calculated limit value of 454 (consumption of elongation at rupture 77 Pereem half of all isocyanate groups), 147.5 g. (0.8 hydroxyl Example 9 1 equivalent) of heXamethyleheglyeel'moheglyeldyl ether of A suspension of 48.8 g. (0.4 mol) of thiodiethyleneglycol in P n P y epoxide equivalent weight y y 200 g. of absolute chlorobenzene was mixed with 139.0 g. (0.8

equivalent weight 185) were added- The reaction mixture was mol) of toluylene-Z,4-diisocyanate. The resulting suspension then heated for 4 hours at 40 C and then for 7 hours at 50 C., was u and heated to 3 to C. during which after after which isocyanate r p could no longer be deteetedabout to minutes the reaction mixture became F r or ng p f chlol'obel'llene was p r towards homogenous. The progress of the reaction was observed by rethe end under a high vacuum. The product was a yellow epoxy peated determination of the isocyanate content of the reaction resin which no longer flow a room tempera r an mixture. When the isocyanate content had dropped to halfits am d 2. 6 p xi e qu l n p r g-. consisting ninitial value and was approaching the calculated isocyanate tlally fth mp u ofthe formula 20 equivalent weight of 484, 129.5 g. (0.8 mol) of c 2-cH-0Hz0(0Ht).0-C0NH NHCO-0(CH)iO-CHzCH-CII2 CH3 NHCOO(CH2)2OCONH -CHa 52.3 grams of the epoxy resin thus obtained were heated to diethyleneglycol-monoglycidyl ether of 98.6 percent purity 50 C. with 133 g. of Aetetrahydrophthalic acid-diglycidyl were added at an isocyanate equivalent weight of 462 and the ester containing 6.4 epoxide equivalents per kg. and then inti- 30 reaction mixture was heated for 4 hours at 40 to 41 C. and mately mixed with 59.4 g. of commercial trimethylhexthen for 2 hours at to 51 C. After this time, isocyanate amethylenediamine (mixture 0f Om 0f 4 hfl- I groups could no longer be detected. The chlorobenzene was n 2,2,4- rim hylh xame hyl nedi min After a then evaporated and the epoxy resin concentrated at a bath vacuum treatment to remove the air bubbles, the mixture was 35 temperature f 60 C. d 0,005 m Hg. pressure until its poured into preheated stretch moulds and heated for 3 hours weight i d constant A quantitative i ld f a hi hl at The sh'eleh Specimens revealed the following viscous yellow product was obtained; it contained 2.36 epoxmechanical properties: ide equivalents per kg. and consisted substantially of the com- Tenslle strength (VSM 77 101) 5.50 kg./mm. pound of the formula OH; NHCO-OC;Hi

elongation at rupture (VSM 77 101) 4 percent. 42,3 grams of the resulting epoxy resin with 15.4 g. of hexahydrophthalic anhydride were heated to 80 C. and Example 8 thoroughly mixed and heated for 16 hours at 100 C, whereu- A suspension of47.2 g. 0.4 ol) ofhexamethyleneglycol in 50 P 3 hard casting of high toughness and good adhesion to 200 g. of absolute chlorobenzene was mixed with 139.0 g. (0.8 glass was obtamed' mol) of toluylene-2,4-diisocyarlate. While stirring the suspension vigorously, it was heated to 33 C. and the progress of the Example 10 reaction was checked by repeated determination of the isocyanate equivalent weight; when it has reached a value of 484, 29 grams (0'32 hydroxyl equivalent) of a polyesfer f 147.5 g (as hydroxyl equivalent weight) of taming hydroxyl groups [prepared by the usual estenficatlon amethyleneglycol-monoglycidyl ether (of 95.1 percent purity; process from 4 01S of setiaclc acid and 5 of Lsdlo] epoxide equivalent weight 171; hydroxyl equivalent weight hydroxyl equwalem we'gm of 637] dlssolved at 55 185) and 200 g. of absolute chlorobenzene were added The In 400 g. of chlorobenzene and the solution was cooled to 25 reaction mixture reacted weakly exothermically after this adon cooling, the ester y llized out again partially. Then dition and was then raised to 40 C. by external heating. A (0'32 mol) of toluylehe2t4'dhsecyehate were added, homogenous solution was obtained only as the reaction whereupon an exothermic reaction Se! in and leacliim xprogressed. After a reaction time of 6 hours at 40 C. and 5 became homhgeheus- The p e was p 3! hours at 50 c isocyanate groups cou|d no longer be 36 to 37 C. by cooling with ice. The progress of the reaction tecte Th reaction mixture was concentrated d fi ll could be checked by repeated determination of the isocyanate heated at 80 C. under 0.005 mm. Hg. pressure until its weight eehtemwhen the iseeyahaie l weight of the reacwas constant, to give a quantitative yield of viscous, yellowish lion mixture approached h Calculated Value Of 2,060 epoxy resin containing 2.52 epoxide equivalents per kg., concyanate equivalent weight of the reaction mixture at which sisting substantially of the compound of the formula only half the originally present isocyanate groups are left),

C6r CH-CH O(CH2)QOCO-HN NHC 0' O (CH2)6'-O CH1 CCH2 remove the air bubbles, the mixture was poured into pre- 48.2 g. (0.32 hydroxyl equivalent) of butane-l ,4-diolthe whole allowed to react for 4 hours at 40 C. and then for 5 monoglycidyl ether of 95.8 percent purity (epoxide equivalent hours at 50 C, after which isocyanate groups could no longer weight 146.0; hydroxy equivalent weight 150.5) were added. be detected. The relatively low-viscous resin contained 1.49 The batch was then allowed to react for 3 hours at 40 C. and epoxide equivalents per kg. and consisted substantially of the for 5 hours at 50 C., after which no more isocyanate groups 5 f pound f -he formula CH NH-C 0-0- could be detected. The batch was concentrated, towards the end under 0.0] mm. Hg. pressure at a bath temperature of 90 C., to yield a light-brown epoxy resin which was solid at room removed of mean molecular weight ggg igg zg 3?:"2; 5: 19:12 ilig g g fl i 100 grams of the epoxy resin thus obtained were heated to thoroughly mixed s 42 5 g of y 5 5 20 80 C. with 133 g. of A-tetrahydrophthahc acld-dlglycidyl ester containing 6.4 epoxide equivalents per kg. and then tnmethyl-cyclohexylamme. Afterasbort vacuum treatment to thoroughly mixed with 42.5 g of 3 (aminomelhy]) 35'5 trimethyl-cyclohexylamine. After a short vacuum treatment to remove the air bubbles, the mixture was poured into prein which G represents the residue of the polybutyleneglycol HOG --OH, whose terminal hydroxyl groups have been heated stretch molds and heated for 16 hours at 100 C. The

stretch specimens revealed the following strength values. heated Stretch molds and heated for 3 hours at 90 C. The

I stretch specimens revealed the following properties: 77 fl Tensile strength (VSM 77 101 6.00 kg./mm. elongation at rupture (VSM 77 I01) 200%. elongation at rupture (VSM 77 101) 5 percent.

Example 13 EXAMPLE 1 1 200 grams of chlo-robenzene were mixed with 33.2 g. (0.25 By the method described above 80.3 g. (0.44 hydroxyl mol) of 1,1,l-trimethylolpropane and 130.0 g. (0.75 mol) of equivalent) of a Polyester containing y y g p toluylene-Z,4-diisocyanate. The reaction mixture was mainlp p y the usual esterification method from 4 mols of tained at to C. initially by cooling and then by heating. adiPic acid and 8 "1015 of i y y equwale"t When the isocyanate equivalent weight of the reaction mixweight 181] r dissolved 3! in 400 8' 0f ture had reached 452 (calculated value 486), 1 19.0 g. (0.75 chlorobenzene, and 77.4 g. (0.44. mol) of toluylene-2,4-diisoh d equivalent i h f di h l l l id l cyanate were added. Shortly before the isocyanate equivalent ether (of 974 percent i h d l i le t i h weight of the reaction mixture had reached the calculated 40 1535; id equivalent i h 1631)) were dd d d h Value of 1,265, 8- (about hydroxyl equivalent) of whole was allowed to react further for 1 hour at 40 C. and Percent diethyleneglycol'monoglycidyl ether were then for 7 hours at C. On completion of the reaction the added- 0 furtherfeacfioll and working PP a light-brow" turbid reaction mixture was filtered through a pressure filter p y was ob'tamed which crytanme at room 45 and finally heated at 80 C. under 0.05 mm. Hg. pressure until Pemmre and commned L83 epoxlde equwalems Per its weight remained constant. A viscous epoxy resin was ob- 89.3 grams of the resulting epoxy resin together with 15.4 g. tained which contained 2.39 epoxide equivalents per kg. and of hexahydrophthalic anhydride were heated to 80 C and consisted substantially of the compound of the formula thoroughly mixed, then heated for 16 hours at 100 C., to 62.8 grams of the resulting epoxy resin together with 133 g. furnish a hard casting of high-tensile strength and adhesion to of hexahydrophthalic acid-diglycidyl ester (containing 6.4

glassepoxide equivalents per kg.) were heated to 50 C. and then I thoroughly mixed with 59.4 g. of commercial trimethyl-hex- Example 12 amethylenediamine (mixture of isomers of 2,2,4-trimethyl- 225.0 grams of l b l i l (mean molecular weight and 2,4,4-trimethyl-hexamethylenediamine). After a short 900; h d l equivalent i h 450 were mixed with 7 g vacuum treatment to remove the air bubbles, the mixture was Q 5 mol) f toluylene 24 diisocyanate The reaction mixture poured into preheated stretch molds and heated for 3 hours at was maintained at 37 to 38 c. initially by slight cooling and 3 The Stretch Specimens revealed the followms P p subsequentl b heatin until after about 45 minutes the isocyanate equivalent weight of the mixture approached the cal- Tenslletrength (VSM 77 101) 5 culated value of 624 (half of all isocyanate groups consumed). elongauon at rupture (VSM 77 4 percent Then 81.0 g. (0.5 hydroxyl equivalent) of the crude butane- Example 14 1,3-diol-monoglycidyl ether described above were added and 2. 174 grams of toluylene-2,4-diisocyanate were mixed with 468 g. of polybutyleneglycol (mean molecular weight 936; Mixturcl Mixlurcll mean hydroxyl equivalent weight 468) whereupon a weakly To exothermic reaction set in. \Yhile excluding moisture and stir- 1 ring the mixture it was maintained at 38 C. until the isohexy)mcthane 7,8 9, 5 cyanate equivalent weight reached 640 to 670, which was the 5 f: eqmvmmlks- I e mix urc L31 L52 case after about 2% to 4 hours Initial viscosity (cP) I 1,500 45,000

642 grams (0.95 isocyanate equivalents) of the preadduct obtained above, of isocyanate equivalent weight 675, were fa a: iniialvismlily 2 mixed with 150 g. (0.95 hydroxyl-equivalents) of 98 percent increased to twice the original value butane-l ,4-diol-monoglycidyl ether, and the whole was stirred l and heated at 50 C. until isocyanate could no longer be de- A can be seen from the foregoing test results, the curable tected. The product obtained was a viscous epoxy resin conmixture ing of PI'CKIIUCt I and i ethyltaining 1.31 epoxide equivalents per kg., consisting substany yn than mixture has an initial i c ity f tially f h compound f h f l 1 1,500 cp. and the curable mixture consisting of product ll acwhere G 'represents the residue of the polybutyleneglycol cording to U.S. Pat. No. 2,830,038 to Pattison and bis(4- HO-G OH, whose terminalhydroxyl groups have been amino-3-methylcyclohexyl)methane mixture ll) has an iniremoved, having a mean molecular weight of 936 (=product tial viscosity of 45,000 cp. The time in which the initial l) viscosity increased to twice the original value is for the mixb. For comparison a viscous polyurethanepolyepoxy resin ture l, 1 hour, and for the mixture ll, 2 hours; that is to say,

according to U.S. Pat. No. 2,830,038 to Patison was after staying for 1 hour, the initial viscosity of mixture I has produced. only increased to Ca 23,000 cp which is the half value of the The compounds for the production of this resin are the initial viscosity of mixture ll.

same as used above, except that the butane-1,4-diol- W l im monoglycidyl ether has been substituted for glycidol. l. A polyepoxide of the formula 174 grams of toluylene-2,4-diisocyanate were mixed with 468 g. of polybutyleneglycol (mean molecular weight 936; mean hydroxyl equivalent weight 468, whereupon a weakly 0 o exothermic reaction set in. While excluding moisture and stir- 4% ring the mixture it was maintained at 38 C. until the iso- C O cyanate equivalent weight reached 640 to 670, which was the case after about 1% to 2 hours. E

642 grams (1.038 isocyanate equivalents) of the preadduct obtained above, of isocyanate equivalent weight 620, were mixed with 78.5 g. (1.038 equivalents) of 98 percent glycidol where n is a whole number of at least 2 and at most 3, R is the freshly distilled, and the whole was stirred and heated at 60 C. radical which is obtained by removing the hydroxyl groups until isocyanate could no longer be detected. The product obfrom a member selected from the group consisting of aliphatic tained was a viscous epoxy resin containing 1.52 epoxide saturated diol or triol of two to six carbon atoms, polyethylene equivalent per kg., consisting substantially of the compound of glycol, polypropylene glycol and polybutylene glycol, A the formula represents the radical which is obtained by removing the ter- CfiQCH-CHr-O-CO-IIIH NHCOOCH:C CH2 C Ha-QNH-C OOGs O-C ONH-CH3 where G, represents the residue of the polybutyleneglycol minal hydroxyl groups from a member selected from the HOG;,OH, whose terminal hydroxyl groups have been group consisting of glycol with four to six carbon atoms and removed, having a mean molecular weight of 936 (=product diglycol with four to six carbon atoms. ll). 2 A polyepoxide of the formula Viscosity data l. Viscosity data of the polyurethanepolyepoxy resins ac- CHa cording to example 14a product I] and example 14b 0 0 Pmduc o,- cr1 0rr,-0-A-o ll-NH 0 Product I Product ll q L Viscosity at 25 c. @9000 CF l77.000 c? J 40C. 13.450 cP 38.000 cP 00 c. 3.730 cP 1.430 C? where n is a whole number of at least 2 and at most 3, R is the I radical which is obtained by removing the hydroxyl groups 2. Initial viscosity andpot life of a curable mixture consistfrom a member selected from the group consisting of aliphatic ing of product i and bis(4-amino-3-methylcyclohexsaturated diol or triol of two to six carbon atoms, polyethylene yl)methane mixture 1) and a curable mixture consisting of glycol, polypropylene glycol and polybutylene glycol, A product ll according to U.S. Pat. No. 2,830,038 to Pattison represents the radical whic i ained by r moving h terand bis(4-amino-3-methylcyclohexyl)methane(=mixturell). minal hydroxyl groups from a member selected from the 17 I 18 group consisting of butanedioll ,4, butanedioll ,3, 2,2- diethyle neglyco]. dimethylpropanedioll ,3. hexanediol-l ,6and 3. A polyepoxide as claimed in claim 1 of the formula C CH-CH:O(CH|)4OCO-HN N$CO*(CH:-)0CH:CCH:

in which G represents the residue of a polyethyleneglycol 1Q removed, havingamean molecular weight of 412. HO-(h-OH, whose terminal hydroxyl groups have been 4. A polyepoxide as claimed inclaim 1 of the formula where G; is the residue of the polybutyleneglycol HOG= of a mean molecular weight of 654.

OH, which has been freed from its terminal hydroxyl groups, 5. A polyepoxide as claimed in claim 1 of'the formula where 6:, represents the residue of the polybutyleneglycol removed, having a mean molecular weight of 980. HOG OH, whose terminal hydroxyl groups have been 6. A polyepoxide as claimed in claim 1 of the formula in which G represents the residue of the polypropyleneglycol mean molecular weight 440. HOG Ol-l, freed from its terminal hydroxyl groups, of 7. A polyepoxide as claimed in claim 1 of the formula O O\ CHz CH-CHzO-(CHz)r0C OHN NHC 00( 2)e CH; NH-C O-O(CH )0C0NH -CHa in which G represents the residue of the polypropyleneglycol removed, having a mean molecular weight of 874.

HOG,OH, whose terminal hydroxyl groups have been 8. A polyepoxide as claimed in claim 1 of the formula 9. A polyepoxide as claimed in claim 1 of the fonnula 10. A polyepoxide as claimed in claim 1 of the formula A polycpoxlde ascla'med m clam 1 ofthe formula where G, is the residue obtained by removing the terminal hydroxyl groups from a polyester with terminal hydroxyl H groups, said polyester being preparedby condensation of 4 mols of adipic acid and 8 mols of butanel ,4-diol.

l5. Curable mixture of 1) the polyepoxide of the formula in which 6, represents the residue of the polybutyleneglycol HOG,OH, whose tenninal hydroxyl groups have been removed, of mean molecular weight 900.

12 A p y p as claimed in claim 1 of the formula where n is a whole number of at least 2 and at most 3, R is the radical which is obtained by removing the hydroxyl groups from a member selected from the group consisting of aliphatic saturated diol or trio! of two to six carbon atoms, polyethylene glycol, polypropylene glycol and polybutylene glycol, A CH1-CHCHa0-(CH:)4OC O-NH represents the radical which is obtained by removing the terminal hydroxyl groups from a member selected from the group consisting of glycol with four to six carbon atoms and diglycol with four to six carbon atoms and (2) a curing agent 3 5 for the polyepoxide (l l6. Curable mixture of l) the polyepoxide of the formula 13. A polyepoxide as claimed in claim 1 of the formula where G, is the residue obtained by removing the terminal where n is a whole number of at least 2 and at most 3, R is the hydroxyl groups from a polyester with terminal hydroxyl radical which is obtained by removing the hydroxyl groups groups, said polyester being prepared by condensation of 4 from a member selected from the group consisting of aliphatic mols of sebacic acid and 5 mols ofhexane-1,6-diol. saturated diol or trio] of two to six carbon atoms, polyethylene 14. A polyepoxide as claimed in claim 1 ofthe forrnul w V glycol, polypropylene glycol and polybutylene glycol, A

' represents the radical which is obtained by removing the terg7 Q minal hydroxyl groups from a member selected from the on, group consisting of glycol and diglycol with four to six carbon atoms, (2) a curing agent for polyepoxide compounds and (3) the diglycidyl ether of a glycol or polyglycol.

t i i i O 2 3 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 162 517 Dated November 30, 1971 Inventor(s) Fredrich Lohse et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

- "I Columns 17-18, claim 3, the middle of the structural formula should read NHCO-O-G -O-CO-NH Columns 17-18, claim 1, the middle of the structural formula should read NH-CO-OG O- CO-NH Columns 17-18, claim 5, the middle of the structural formula should read NH- CO-O-G O-CO-NH Columns 17-18, claim 6, the structural formula should read CH CH- GE -o- (cH -o- CO-NH NH-CO-O- (c11 -o-cH -cH CH NH- CO- 0- GLF O- CO- NH CH:

Page 1 of 2 3 3 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,62 +,178 Dated November 30, 1971 Inventor(s) Fredrich Lohse et al It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Columns l7 18, claim 7, the structural formula should read CH CH-CH O- (CH -O- CO-HN NI-I-CO-O- (CH M-O-CH CH--CH CH3 NH- 00- s 0- combo Columns 17-18, claim 8, the structural formula should read CH CH- CH -O- -O-CONH NH-CO-O- (CH O- CH CH- H 2 2 6 CH3@ (CH2 0- @cm Columns 17-18, claim 9, the structural formula should read CH NH- (30- O- (CH O CO-NH CH3 Signed and sealed this 27th day of June 1972.

(SEEM Attest:

EDIJARD M.F'LETCHER, J'R. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents 

2. A polyepoxide of the formula
 3. A polyepoxide as claimed in claim 1 of the formula
 4. A polyepoxide as claimed in claim 1 of the formula
 5. A polyepoxide as claimed in claim 1 of the formula
 6. A polyepoxide as claimed in claim 1 of the formula
 7. A polyepoxide as claimed in claim 1 of the formula
 8. A polyepoxide as claimed in claim 1 of the formula
 9. A polyepoxide as claimed in claim 1 of the formula
 10. A polyepoxide as claimed in claim 1 of the formula
 11. A polyepoxide as claimed in claim 1 of the formula
 12. A polyepoxide as claimed in claim 1 of the formula
 13. A polyepoxide as claimed in claim 1 of the formula
 14. A polyepoxide as claimed in claim 1 of the formula
 15. Curable mixture of (1) the polyepoxide of the formula
 16. CuRable mixture of (1) the polyepoxide of the formula 